2018年4月21日雅思阅读题目预测Newly Hatched birds
【摘要】 即将参加雅思考试的考生们，考试即将到来，你们的备考工作进行得如何了？考必过为大家精心整理了2018年4月21日雅思阅读题目预测Newly Hatched birds，希望能够帮助大家通过雅思考试。那么，同学们一起快来做题吧！关于2018年4月21日雅思阅读题目预测Newly Hatched birds的具体内容如下：
很快2018年4月份的雅思又临近了，同学们做好准备没有呢？今天就和考必过的小编一起来看看2018年4月21日雅思阅读题目预测Newly Hatched birds
雅思阅读文章题目 Newly Hatched birds
重复年份 20150430 20130718 20100821 20070922
雅思阅读题材 动物
雅思阅读题型 暂无
雅思阅读文章大意 有一种通过敲击蛋壳加速蛋的孵化，并解释了同时孵化的原因。后面又比较了各种鸟的喂食方式。
参考阅读：
The changes in body weight and composition were examined in broilers that either had immediate access to feed and water or had not been fed for 48 h posthatch. Chicks without access to feed decreased in BW by 7.8% in the 48 h posthatch， which was equivalent to 5.3 kcal/45 g chick/d. However， during this period the small intestines increased in weight and protein content by 80% or more. The decrease in yolk fat and protein could account for most of the changes in body composition in the feed-deprived chick. In contrast， fed chicks grew by 5 g and used 4.5 kcal/d for maintenance； during this period small intestines increased in weight by 110%. Intestinal absorption of exogenous nutrients was determined from hatch through 4 d posthatch by administration of a bolus of labeled glucose， methionine， or oleic acid， together with a nonabsorbed reference substance. Absorption of fatty acids was more than 80% at hatch and was higher than that of glucose and methionine， which was low especially when the bolus was administered as a solution. Absorption of all components tested increased with age and was more than 80% on Day 4. Duodenal in situ uptake determinations in hatching chicks indicated that uptake of oleic acid was high from yolk and saline solutions compared with glucose and methionine， which exhibited low uptake from yolk but higher uptake from saline solutions. These studies indicate that， although the small intestine has the capacity to absorb carbohydrates and amino acids at hatch， uptake may be dependant on the development of suitable conditions， including sufficient pancreatic and brush border enzymes for digestion and adequate sodium for function of the glucose-sodium cotransporters.
以上就是考必过为大家整理的2018年4月21日雅思阅读题目预测Newly Hatched birds的具体内容，你全部做对了吗？所谓未来，其实只是过去的堆砌，堆砌昨天便有了今天，堆砌今天便有了明天，堆砌明天便是未来。最后，考必过预祝大家在未来的雅思考试中能够取得优异的成绩！